Magnetic tack



FIG. 1 is a top perspective view of a magnetic tack according to my invention;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a magnetic tack, as shown and described. 